FBI sources say Ibragim Todashev, a friend of accused Boston Marathon bomber Tamarlen Tsarnaev, was unarmed when he was shot and killed by an FBI agent during questioning at an Orlando apartment last week.

Sources said Todashev might have been lunging toward a sword, but he was not in possession of it.

Law enforcement officials said Todashev was in the process of confessing to a 2011 triple murder in Waltham, Mass., and was working on writing out the details of the crime when he snapped and turned violent.

Sources said a sword was inside the apartment, but the weapon was moved to the corner of the room before questioning began. Law enforcement said when Todashev lunged, the FBI agent believed he could have possibly been going for his gun or the sword in the room, and that's when the agent opened fire.

Todashev is from Chechnya and was a known associate of Tsarnaev. They both lived in the Boston area at the same time and were involved in mixed martial arts.

The Medical Examiner's Office ruled Todashev's death a homicide but will not release any further details about the autopsy pending the law enforcement investigation.

The Massachusetts State Police will only confirm their agents were inside the apartment, but neither was injured. Officials said the interview was happening inside of his apartment to gain his trust and to make him feel more comfortable.

A friend of Todashev told WESH 2 he has received the body and is in the process of having it shipped back to Chechnya.